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Finding the Fourth Proportional to 68,987.70, 103,481.55 and 24,615.90

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Solution

The fourth proportional to 68,987.70, 103,481.55 and 24,615.90 is: 36,923.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,987.70 : 103,481.55 = 24,615.90 : x
  2. Step 2: Convert to fraction form
    68,987.70/103,481.55 = 24,615.90/x
  3. Step 3: Cross multiply
    68,987.70x = 103,481.55 × 24,615.90
  4. Step 4: Simplify right side
    68,987.70x = 2,547,291,486.65
  5. Step 5: Solve for x
    x = 2,547,291,486.65/68,987.70
  6. Step 6: Final answer
    x = 36,923.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.